Thanks Ian. I use Chrome and did as instructed. Still no response on any of the listed puzzles - except for July 6 and 7 which I could access previously. My computer is in its death throes - crashing in various ways on a daily basis, so it must have something to do with that. It's 5 years old, so, like me, is probably wearing out! My only reservation is that a replacement will have Windows 10 installed - which I have on my laptop and really don't enjoy using. I've always had my desktops custom built in Young, but guess that now I'm in Canberra will have to get one off the shelf.
Thanks for your advice. I do have a subscription to CC Cleaner, so may give that a go now I know the problem is with me.